Improvement in dies for shaping hatchet-blanks



J. YEBKES.

Dies for Shaping Hatchet'Blanks. NO. 13,6, 79, PatentedMarch 4,1873.

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JONATHAN YERKES, OF FRANKFORD, (PHILADELPHIA,) PENNSYLVANIA, ASSIGNOR TO YERKES AND PLUMB, OF SAME PLACE.

IMPRGVEMENT IN DIES FCR SHAFiNG HATCHET-BLANKS.

Specification forming part of Letters Patent No. l3 ,4=7. dated March 4, 1873.

proved die for shaping hatchet-blanks, showing also the die B above the same. Fig. 2 is a vertical transverse section of the same taken on the plane of the line 0 c, Fig. 1. Fig. 3 is a plan or top View of the die.

Similar letters of reference indicate corresponding parts.'

The invention consists in dies constructed as hereinafter described and claimed.

The chief objection to the use of dies in the manufacture of hatchets, thus far, has been the lateral enlargement produced on the blanks by their pressure, and the consequent trouble of sharpening them. This is avoided by the use of the lips which permit the application of full power, and at the same time aid in giving shape to the blanks. The more tedious and expensive ordinary process of forging these blanks under power-hammers is thus substituted by the more effective and rapid action of the dies. 7

A in the drawing represents the die used by me in the manufacture of hatchets. It has, near the forward end Where its surface a is concave or flat, projecting lips b b at the sides, the inner faces at of said lips being beveled, as is clearly shown in Fig. 2. Where the face of the die is convex or ridge shaped, as at e, the lips are not required, as the lateral enlargement of the blank over the rounded ridge is desirable. The die B is of the same form as an inverted die A.

The blank to be shaped is placed on the lower die, and the upper then brought down. The lips b embrace the blank before the surfaces a can reach and press it; therefore, the lips prevent alllateral enlargement, and serve, in fact, to bevel the corners of the blank, and start the octagonal shape of the hatchet-head.

H avin g thus described my invention, I claim as new and desire to secure by Letters Patent- The dies A B, each provided with a convex portion, 6 c, and lips I), constructed substantially as described.

JONATHAN YERKES.

Witnesses:

PETER CASTOR, WM. B. HILL. 

